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The graceful exit in pre-big bang string cosmology

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arxiv hep-th/9910169 v3 pith:D3VZPASL submitted 1999-10-21 hep-th

classification hep-th
keywords bangpre-bigcosmologyexitgracefulscenariosolutionsstring
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We re-examine the graceful exit problem in the pre-big bang scenario of string cosmology, by considering the most general time-dependent classical correction to the Lagrangian with up to four derivatives. By including possible forms for quantum loop corrections we examine the allowed region of parameter space for the coupling constants which enable our solutions to link smoothly the two asymptotic low-energy branches of the pre-big bang scenario, and observe that these solutions can satisfy recently proposed entropic bounds on viable singularity free cosmologies.

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Cited by 1 Pith paper

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  1. Strong coupling and instabilities in singularity-free inflation from an infinite sum of curvature corrections

    gr-qc 2025-05 conditional novelty 6.0 of 10

    The infinite-sum Lovelock inflation solution is ruled out by strong scalar coupling and tensor Laplacian instabilities.

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